Recurring heavy rain caused minor to marginally major flooding of the Big Sioux River beginning on June 13th, and continuing to the end of the month.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FSD wrote it up.
Recurring heavy rain caused minor to marginally major flooding of the Big Sioux River beginning on June 13th, and continuing to the end of the month.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before the first event at Jun 13, 3:34 AM CST, 2 hours 26 minutes earlier.
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA NATIONAL WEATHER SERVICE SIOUX FALLS SD 434 AM CDT SUN JUN 13 2010 .DISCUSSION... ANOTHER ROUND OF SHOWERS AND A FEW THUNDERSTORMS ROLLING ACROSS THE CWA THIS MORNING...ALBEIT NOT NEARLY AS HEAVY AS WE HAVE SEEN THE PAST FEW NIGHTS AS MAIN MCS LOCATED MUCH FARTHER SOUTH IN THE CENTRAL PLAINS. DRIVING FORCE FOR ACTIVITY IN OUR AREA NOT AS DISCERNIBLE AS DISTINCT WAVES OF PAST NIGHTS...BUT APPEARS TO BE SOME CORRELATION TO WEAK MID LEVEL FRONTAL BOUNDARY FROM 800-700MB WHICH WEAKENS AND SAGS SLIGHTLY SOUTH THROUGH THE DAY. WITH THIS IN MIND...WILL CONTINUE TREND OF DECREASING POPS THROUGH THE DAY... INCREASING AGAIN INTO THE SOUTHWEST LATE THIS EVENING/TONIGHT AS THE MAIN UPPER TROUGH IN THE SOUTHERN/CENTRAL ROCKIES BEGINS TO LIFT NORTHEAST AND PHASE IN WITH STRONGER NORTHERN STREAM WAVE DROPPING INTO THE NORTHERN PLAINS OUT OF CANADA. MODELS APPEAR SIMILAR IN EVOLUTION OF THE MAIN WAVE...WHICH TRENDS TOWARD CUTTING OFF OVER THE NORTHERN PLAINS MONDAY NIGHT BEFORE SLOWLY EXITING TO THE NORTHEAST INTO THE WESTERN GREAT LAKES BY TUESDAY NIGHT. WE SEEM TO HAVE NO TROUBLE GETTING SOME LIGHT TO MODERATE SHOWERS WITH ANY OF THE WAVES IN THIS PATTERN...SO HAVE BUMPED POPS INTO LIKELY RANGE FOR SUNDAY NIGHT WHEN DEEPER MOISTURE STILL PRETTY EXTENSIVE ACROSS THE SOUTHERN PARTS OF THE CWA. HAVE ONLY HALTED SHORT OF LIKELY POPS BEYOND THAT PERIOD DUE TO SIGNS OF DRYING IN MID LEVELS SOUTH OF THE UPPER TROUGH THAT COULD RESULT IN MORE SCATTERED COVERAGE TO PRECIP. WITH SOMEWHAT SLOWER EXIT OF THE UPPER TROUGH...HAVE LINGERED SOME SMALL POPS ACROSS OUR NORTHEAST HALF INTO TUESDAY...WITH DRY PERIOD TUESDAY NIGHT/WEDNESDAY. NAM/GEM/ECMWF ALL BRING ANOTHER SUBTLE WAVE NORTHEAST OUT OF THE DEVELOPING TROUGH OVER THE ROCKIES WEDNESDAY NIGHT...FOLLOWED BY MAIN TROUGH AND ASSOCIATED COLD FRONT THURSDAY/THURSDAY NIGHT. SOME DIFFERENCES IN STRENGTH/TIMING AMONG THE MODELS...BUT CHANCE POPS ALREADY IN THE FORECAST SEEM WARRANTED THROUGH THIS PERIOD WITH THREAT OF SEVERE WEATHER WITH THE COLD FRONT THURSDAY/THURSDAY NIGHT AS THE BOUNDARY MOVES INTO INCREASINGLY MOIST/UNSTABLE AIRMASS. TEMPS WILL REMAIN ON THE COOL SIDE WITH EXTENSIVE CLOUD COVER/RAIN CHANCES TODAY THROUGH MONDAY...WITH GRADUAL WARMUP THROUGH MIDWEEK. && .AVIATION... WDSPRD MVFR CIGS 1-3K FT SHUD CONT THRU 21Z. AREAS OF CIGS 5 HND TO 1K FT AND VSBYS 3-5SM EXPECTED IN SHRA/TSRA/BR THRU 18Z...LCL 3-5SM IN SHRA MAY PERSIST THRU 14/00Z. 21Z-14/06Z SHUD BRING IMPROVEMENT TO VFR FROM THE N OVER NRN AND WRN FCST AREA DOWN TO FSD. E/S OF FSD EXPECT MVFR CIGS TO CONT THRU 14/12Z WITH REDVLPMNT OF LCL IFR CONDS AS SHRA/TSRA AREAS AGAIN DVLP. / WILLIAMS && .FSD WATCHES/WARNINGS/ADVISORIES... IA...NONE. MN...NONE. NE...NONE. SD...NONE. && JH/WILLIAMS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 446 AM CDT SUN JUN 13 2010 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-141200- AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA- CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE- DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON- IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN- LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN- OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN- SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON- 446 AM CDT SUN JUN 13 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT FLOODING... RUNOFF FROM VERY HEAVY RAIN LATE LAST WEEK HAS RESULTED IN SIGNIFICANT RISES ON MANY RIVERS AND STREAMS ACROSS THE AREA. MAIN STEM RIVERS WHICH HAVE RISEN...OR ARE EXPECTED TO RISE ABOVE FLOOD STAGE INCLUDE... THE JAMES...VERMILLION...AND BIG SIOUX RIVERS IN SOUTHEAST SOUTH DAKOTA...AS WELL AS THE LITTLE SIOUX RIVER IN NORTHWEST IOWA. AREAL FLOODING OF SMALL STREAMS AND CREEKS CONTINUES IN SOUTH CENTRAL SOUTH DAKOTA BETWEEN THE JAMES RIVER AND MISSOURI RIVER...RESULTING IN NUMEROUS ROAD CLOSURES IN RURAL AREAS. THIS AREA HAS RECEIVED 4 TO 8 INCHES OF RAIN IN THE PAST 3 OR 4 DAYS...AND ADDITIONAL RAINFALL IS EXPECTED TO SPREAD INTO AREAS SOUTH OF INTERSTATE 90 AFTER SUNSET TONIGHT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY ALTHOUGH TIMING IS UNCERTAIN...AT THIS TIME IT APPEARS THAT A STRONG UPPER LEVEL SYSTEM COULD BRING A THREAT OF SEVERE THUNDERSTORMS TO THE AREA THURSDAY INTO THURSDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK.
The national radar mosaic for the moment the first event began.
3 flood. Local standard time, as filed.
Recurring heavy rain cause moderate flooding of the Big Sioux River. Some roads and fields along the river were flooded. The river crested at just under 4 feet above flood stage at Hawarden, Iowa on June 30th.
Recurring heavy rain cause moderate flooding of the Big Sioux River. Some roads and fields along the river were flooded. The river crested at just over 3 feet above flood stage at Akron on June 23rd.
Recurring heavy rain cause minor to moderate flooding of the Big Sioux River. Some roads and fields along the river were flooded.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2010Every state in 2010This day in weather historyWarnings in Iowa, June 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 246872, 246874, 246879.